DirectNET

Data Center Management Solutions including UPS Systems, Data Center Cooling, KVM over IP & IP Power Strips, Server Racks and Server Rack accessories; KVM Switches and KVM Extenders; Rackmount Monitors and Rackmount Keyboards.

NAVIGATION
	Home
	Store

INSIDE MAC
	Television Shows
	Broadcast Shows
	Daily News Shows
	Special Shows

EVENTS




DAILY TIPS
	Design
	Mac OS X
	Mac OS X UNIX

COMMUNITY
	Forums
	Surveys

NEWS
	Current
	Press
	Archive

FEATURES
	Editorial
	Dr. Mac
	Reviews
	Reader Reports

RESOURCES
	FAQ
	Documentation
	Learning Center
	MAN pages
	Glossary
	Tutorials
	Tips
	Links

OUR PARTNERS

OSXFAQ Mac OS X UNIX Tip-of-the-Day

Week 103 - Unix Commands Reference III (28 March 2005)

by Adrian Mayo - Editor, OSXFAQ

Friday - Commands for Network Information

hostname ... set or display the hostname
Option -s to display hostname without domain name part.
hostname is normally set automatically from /etc/hostconfig

ifconfig ... configure network interfaces
Without any parameters displays the configuration for all network interfaces
For example, 'ifconfig en0 down' then 'ifconfig en0 up' resets en0.

ipconfig ...set the IP mode of an interface
Usage is:
ipconfig set <interface> BOOTP|MANUAL|DCHP|NONE|INFORM

route ... maintain network routing tables
The routine information for a destination can be queried with:
route -v get apple.com
route -v get localhost

arp ... maintain address resolution protocol tables
The tables map IP addresses to Ethernet addresses
Option -a to display all table entries

service ... start and stop xinetd services
option --list to list the services
The possible commands are 'start' and 'stop'.

netstat ... display the network status
Shows the state of all network connections (sockets)
Option -I to specify a particular interface like en0

tcpdump ... dump tcp activity
Option -v, -vv, -vvv to increase verbosity of reports
For example, to listen to network traffic with apple.com use 'sudo tcpdump -vvv host apple.com'

tcpflow ... dump and analyse tcp activity
Like tcpdump but not included with OS X. Available from ports such as Fink.

nslookup ... interactive domain name query (DNS)

dig ... look up DNS information
Works both as a one-off command or interactively.

host ... look up DNS information
Option -t to specify the type of DNS record to look up.
For example 'host -t ns apple.com' to fetch name server records for apple.com. 't can also be 'mx', 'a', 'soa', etc.
Option -a to request all DNS information for the host

(See tips week 43)

named ... DNS daemon
This runs a DNS service

ntpd ... network time protocol daemon
This runs an ntp server

ntpq ... query ntp time server

ntptimeset ... set network time

Discuss this trick in the Learning Center forum

If you want to learn more about Mac OS X Unix visit the Learning Center click.

For beginners: Mac OS X Unix Tutorials
For detailed information on specific topics: Advanced Unix
For OS X in gereral: Mac OS X Tutorials


Copyright © 2000-2008 Inside Mac Media, Inc. All rights reserved.
Apple assumes no responsibility with regard to the selection, performance, or use of the products or services. All understandings, agreements, or warranties, if any, take place directly between the vendors and prospective users.
Apple, the Apple logo, Mac, PowerMac G4, PowerMac G5, Xserve, Xserve RAID, PowerBook, iBook, Airport, AirPort Extreme, iMac, eMac, iLife, iMovie, iCal, iPhoto, iTunes, QuickTime, FireWire, iPod, iSight, AppleWorks, Macintosh, Jaguar, Panther, Mac OS, Mac OS X and Mac OS X Server are trademarks of Apple Computer, Inc.